(19)

(11)

EP 1 412 791 A1

(12)

(43) Date of publication: 28.04.2004 Bulletin 2004/18 (21) Application number: 02765795.6 (22) Date of filing: 03.07.2002

(51) International Patent Classification (IPC)7: G02B 6/34 (86) International application number: PCT/US2002/021175 (87) International publication number: WO 2003/007038 (23.01.2003 Gazette 2003/04)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 03.07.2001 US 302904 P 01.07.2002 US 393209 P (71) Applicant: BROWN UNIVERSITY RESEARCH FOUNDATION Providence, RI 02912 (US)	(72) Inventors: LEVNER, Daniel Toronto, Ontario M2R 3C7 (CA) FAY, Martin, F. Providence, RI 02906 (CA) (74) Representative: Higgin, Paul  Swindell & Pearson48 Friar Gate Derby DE1 1GY Derby DE1 1GY (GB)